This resource provides an explanation of NASA's GALEX mission and how the space-based telescope can view distant galaxies as they were billions of years ago. The resource also discusses the other aspects of galaxies that GALEX...

The spacecraft is drifting too far off course! Two games help explain how a spacecraft can use its thrusters to maintain its position. The games have pupils be the components of vectors in order to create and counteract the...

[Free Registration/Login may be required to access all resource tools.] This study guide summarizes key points about electromagnetic radiation and the different types of telescopes that rely on various forms of it. Includes a few...

The story of space exploration is told from the first successful rocket built in 1926 to space probes and the International Space Station.

Pictures and descriptions of the robot spacecraft that have explored the planets and outer space since the 1960s.

Comet collision with Jupiter with lots of pictures and some text. Links to the information about the comet, the impacts, and observations made by four different spacecraft.

Illustrated discussion of the invention of the telescope with details on Galileo's telescope, the reflecting telescope, and the space telescope.

Part of the National Air and Space Museum's online exhibition about Exploring Planets, this describes and gives visuals of telescopes, probes and fly-by aircrafts, orbiters, and landers as current methods for earth and airborne...

Albert Einstein was one of the most influential scientists in the 20th century. Read about his contributions on the fact filled site from the Space Telescopes Science Institute.

[Free Registration/Login may be required to access all resource tools.] Discusses how telescopes are constructed and how they are used to help see the night sky.

Space can be explored in many different ways. Read about space exploration and click on the topics on the right margin to find out how man finds out about his universe.

The expansion and explosion of a star is described at it goes through its nova phase. Current theories are discussed.

A detailed look at comets. Content outlines our observational history, as well as the origins of comets and an explanation of the appearance of comets.

This site provides a detailed overview of the comet C/1995 01 (Hale-Bopp), the great comet of 1997. Content includes discovery, and observational and orbit information, as well as several images.

This is a very comprehensive site on the subject of Astronomy and Astrophysics. The site has links to many sites on topics including astronauts, astronomy, astrophysics, education, jobs, etc.

Contains an introduction to x-ray astronomy, describing how x-rays are being used by scientists to learn about the universe. Also contains links to sites describing black holes, dark matter, neutron stars, and how they are investigated...

An excellent report on the planet Uranus. The site includes detailed information about the planet as well as links to information about Uranus moons, unmanned probes sent to explore Uranus, and an extensive set of images of the planet.

This site contains copious information about Pluto. The site contains descriptive and statistical information, as well as a detailed article about the search for trans-Plutonian planets and the "Nemesis" hypothesis.